Process for the entrapment and recovery of so2 gas

Abstract

Abstract WASTE STACK GASES OR OTHER GASES CONTAINING SULFUR DIOXIDE GAS ARE PASSED INTO A SYSTEM INITIALLY CONTAINING 90 TO 95% OF FINELY DIVIDED METALLIC OXIDES AND METALLIC SILICATES, INTIMATELY ADMIXED WITH AN ADDITIVE COMPRISING NOT LESS THAN 3% OR MORE THAN 5% WATER, NOT LESS THAN 2% OR MORE THAN 5% DISSOLVED ALKALI HYDROXIDE SUCH AS SODIUM HYDROXIDE OR SODIUM METASILICATE AND BETWEEN 01% TO 0.1% STANNUOUS CHLORIDE OR STANNOUS HYDRIDE ALL OF THE ABOVE NOTED PERCENTAGES BEING BASED ON PARTS BY WEIGHT OF EACH NOTED INGREDIENT PRESENT IN EVERY 100 PARTS BY WEIGHT OF THE SLAG CONTAINING SYSTEM. THE SYSTEM IS STRONGLY AGITATED DURING THE TIME THE WASTE STACK GAS IS BEING PASSED THERETHROUGH. THE SULFUR DIOXIDE CONSTITUENT OF THE STACK GAS IS ENTRAPPED IN THE SLAG SYSTEM AND CAN BE LIBERATED THEREFROM IN ESSENTIALLY PURE FORM BY SUBSEQUENT HEAT TREATMENT OF THE ENTRAPMENT SYSTEM. THE SYSTEM CAN THEREUPON BE RESUED REPEATEDLY FOR ENTRAPMENT OF FURTHER SO2 GAS BECAUSE IT IS ESSENTIALLY REGERATABLE DUE TO THE ADDITION OF THE ADDITIVES NOTED ABOVE WHICH PREVENT UNDUE OXIDATION OF THE COMPONENTS OF THE SYSTEM.

Inventors

• 👤 H Wilson

Bibliographic Details